Local constraint damping layer vibration test tool

Abstract

The invention relates to a local constraint damping layer vibration test tool comprising a test frame which is formed by multiple channel steel through welding. A single constraint damping layer or multiple constraint damping layers is / are installed on the local position of a part of channel steel in the test frame. The constraint damping layers are installed on the conventional vibration test tool to absorb excess vibration energy, especially the vibration component of the inherent frequency, in the vibration test process of the tool so that the effect of suppressing the vibration amplitude of the resonant frequent can be achieved, the amplification or attenuation amplitude of vibration transmitted to the test system or equipment from a vibration table is ensured to be low as much as possible and the over-test or under-test phenomenon of the system or the equipment in the vibration test process can be avoided. In a word, the constraint damping layers are adhered on the local position of the conventional tool so that the vibration transmission performance of the tool near the inherent frequency can be greatly improved, and the influence on the overall static stiffness and dynamic stiffness of the tool is quite low.

Description

technical field [0001] The invention relates to a damping layer vibration test tool, which is a locally constrained damping layer vibration test tool for vibration environment tests and reliability tests of systems and equipment, and belongs to the technical field of vibration environment and reliability tests. Background technique [0002] In the vibration test, the main function of the test fixture is to transfer the energy generated by the vibrating table to the test system or equipment. The key performance indicators for the assessment fixture include: 1) The first-order natural frequency of the test fixture should be large enough to ensure that its frequency response curve It is flat and has no obvious peak in the whole test frequency band; 2) In the vibration test frequency band, there is no vibration coupling between the tooling and the product; 3) The greater the stiffness-to-mass ratio of the tooling, the better. [0003] Traditionally designed test fixtures can bas...

AI Technical Summary

Problems solved by technology

This method improves the damping of the tooling to a certain extent, but the resonance peak amplitude of the tooling is still high, and the vibration transmission characteristics are still not ideal; in addition, the patent simply pastes a constrained damping layer on each component of the tooling , it does not choose the part with larger displacement on the tooling, which increases the use of a lot of damping materials that do not work, and the vibration attenuation effect is relatively common

[0004] In conclusion, it is gradually recognized that increasing tooling damping can reduce the resonance peak and improve its vibration transfer characteristics, but the effect is still not obvious

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